

Friedel-Crafts Reactions Flashcard
Flashcard
•
Chemistry
•
University
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a Friedel-Crafts reaction?
Back
A Friedel-Crafts reaction is an electrophilic aromatic substitution reaction that introduces alkyl or acyl groups into an aromatic ring using a Lewis acid as a catalyst.
2.
FLASHCARD QUESTION
Front
What are the two main types of Friedel-Crafts reactions?
Back
The two main types are Friedel-Crafts Alkylation and Friedel-Crafts Acylation.
3.
FLASHCARD QUESTION
Front
What is the role of a Lewis acid in Friedel-Crafts reactions?
Back
A Lewis acid acts as a catalyst that helps generate the electrophile necessary for the reaction.
4.
FLASHCARD QUESTION
Front
What is the electrophile in Friedel-Crafts Alkylation?
Back
The electrophile is typically a carbocation formed from an alkyl halide.
5.
FLASHCARD QUESTION
Front
What is the electrophile in Friedel-Crafts Acylation?
Back
The electrophile is an acylium ion generated from an acyl chloride and a Lewis acid.
6.
FLASHCARD QUESTION
Front
What is a limitation of Friedel-Crafts Alkylation?
Back
A limitation is that over-alkylation can occur, leading to polysubstitution on the aromatic ring.
7.
FLASHCARD QUESTION
Front
Why do deactivated benzene rings not react in Friedel-Crafts reactions?
Back
Deactivated benzene rings have electron-withdrawing groups that reduce the electron density of the ring, making it less reactive towards electrophiles.
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